﻿//
// NullabilityAttributes.cs
//
// Authors:
//   Alan McGovern alan.mcgovern@gmail.com
//
// Copyright (C) 2019 Alan McGovern
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//


using System;
using System.Diagnostics;

#if NETSTANDARD2_0 || NET472
namespace MonoTorrent
{
    [AttributeUsage (AttributeTargets.Parameter, Inherited = false)]
    sealed class MaybeNullWhenAttribute : Attribute
    {
        public MaybeNullWhenAttribute(bool returnValue)
        {

        }
    }

    [AttributeUsage (AttributeTargets.Parameter, Inherited = false)]
    sealed class NotNullWhenAttribute : Attribute
    {
        public NotNullWhenAttribute (bool returnValue)
        {

        }
    }

    [AttributeUsage (AttributeTargets.Parameter | AttributeTargets.Property | AttributeTargets.ReturnValue, AllowMultiple = true, Inherited = false)]
    internal sealed class NotNullIfNotNullAttribute : Attribute
    {
        public NotNullIfNotNullAttribute (string parameterName) { }
    }
}
#endif
